Instructor charged with indecent assault

New charges have been laid against a Sydney gymnastics instructor over the alleged indecent assault of a teenage boy.

The 43-year-old man, who instructs at Gladesville and Olympic Park, was arrested in December and charged with two counts of indecent assault over alleged offences against a 14-year-old boy during a sports massage.

Detectives have since been advised of alleged offences against a second boy, aged 13, during a massage late last year.

Police allege the assault was filmed without the child's knowledge.

The man faces additional charges of indecent assault and using a child under 14 to make child abuse material.